How to get spoil of conquest

[ダリア]

I have heard it drop from raid but some encounter give some not is it random or need to be specific? and with the weekly rotation raid being farmable can i also farm spoil of conquest there?

[EckyThump]

They drop from all raid encounters but drop slightly differently depending on whether the raid is the featured one or a legacy one. There is no randomness involved.

Featured raid - Vow of the Disciple,
First completion per class per week gives pinnacle rewards only from encounter chests, no spoils. 5x spoils drop from secret chests and 5x spoils from a challenge chest too.
Subsequent completions will give 5x spoils from encounter chests but none from the others.

Legacy raids - all the others,
First completion per class per week gives 3x spoils from the encounter chests. I don't believe secret chests give spoils. I've heard Vault of Glass might award things a little differently, not sure.
One legacy raid per week becomes the active one for the weekly raid rotation. That lets the encounter chests be farmed for gear but I don't believe they drop additional spoils.